Learning in Math: Doubles, Doubles +1 and Doubles +2; Doubles -1 and Doubles -2

What we will learn about doubles this week:

Pattern for Doubles:
As each number being doubled is one more, it results in a total that is two more.

Using Doubles + 1 and Doubles - 1:
When children are able to firmly and fluently know their doubles up to ten, they will see how to quickly find the totals for doubles plus 1. For example
4+4 = 8
4+5 = 8+1 more = 9
or 4 + 4 + 1 = 4 + 5 = double 4 + 1 more = 9

or 4 + 5 = 4 + (4 +1) = 8 + 1 = 9. Does this remind you of algebra? :) We are learning some pre-algebra strategies (without naming it) that will hopefully help your child in future years of mathematics.

Another example would be: 8+7 = 7+7+1 = 14+1.

Also, they can use doubles minus one for the same equation. 8 + 7 = 8 + 8 - 1 = 16 - 1 = 15.

Either way would work, doubles minus one (right above) or doubles plus one: 7 + 7 = 14 and 7+1 = 8 so 7+7+1 = 14+1 = 15.

Doubles Plus 2:
4+5 = the numbers 4 and 5 are 1 number apart: so referring back to doubles: 4+4 = 8 and
 4 +5 = 8 + 1 = 9


4+6 = the numbers 4 and 6 are 2 numbers apart: so 4+4 = 8 and 4+6(is two more than the doubles of 4) so 4 + 6 = 8 + 2 = 10

Your child will also learn how to recognize Doubles Minus1 and 2:
for example: 8 + 7 = 8 + 8 - 1 = 16 - 1 = 15

8+6 = 8 + 8 = 16 -2 = 14